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Strategies for mono-black against enchantments

Targeted discard

The best black cards against enchantments are targeted discard spells.

Targeted discard lets you deal with practically any card before it hits the battlefield. Getting the most out of them may require some finesse (here is THE guide on that subject.), but these cards are powerful tools that you can use to deny your opponent access to their most critical cards.

Targeted discard shines in a traditional duel environment (one-on-one, best-of-three play), where you can focus on taking apart a single deck's gameplan. It's much harder — though not impossible — to wield effectively in casual multiplayer.

The "just deal with it" strategy

Another common solution is to just play through. Pacifism on your guy? Just write him off as dead (until you need a sacrificial creature or something). Moat preventing you from attacking? Stall until you can dig out your direct damage or your big flying Demon. Nevermore preventing you from playing your commander? Rely on your other cards to kill your opponent. Did your opponent put a Furnace of Rath on the field? Start racing for damage.

It's tough and you're often at a disadvantage, but often if you focus on what you can do instead of what you can't, you can find some tactical way to "play around" the problematic enchantment. Often the best insurance against "prison" strategies, besides raw speed, is to build in a variety of win conditions.

Specific hosers for specific cards

Another thing you can do if a specific card is causing you problems is find cards that don't remove it, but negate its effect. For example, Everlasting Torment can make Circle of Protection: Black sit there uselessly in play, while Spirit of the Labyrinth effectively blanks a number of "draw a lot of cards" decks. Generally these work best as sideboard cards, unless they're cards that fit into your deck's general gameplan anyway (e.g. you really want to use Everlasting Torment's -1/-1 counters as part of your own strategy).

Cards that actually remove enchantments

A true "all-black" deck has very few options

Enchantment removal isn't in black's part of the "color pie." Meaning it's not something black is supposed to do.

Liliana of the Veil's -6 ability can take care of any permanent, including enchantments. Your opponent gets a choice, but that's where skillful play comes in — if your opponent is willing to sacrifice everything to keep some enchantment in play, then, well, maybe you should just let them.

In this case, we've basically struck out. You have a few cards that you might be able to use to remove enchantments — almost as an afterthought, — but nothing nearly as direct as a simple Oblivion Ring or Naturalize. I wouldn't include any of these cards in a deck just to deal with enchantments (I'd play Liliana for, well, general awesomeness, though).

Colorless cards for your mono-black deck

Generally, whenever you need a mono-color deck to do something that its color can't really do, try this: use artifacts and other colorless cards to do stuff your color can't (try searches like colorless + "destroy" + "permanent").

Some of these are pretty mana-intensive, making them better fits for multiplayer decks than dueling decks.

Splashing colors

If you want more cost-effective removal, add more colors instead. Most of the gold standards for multi-faceted removal are multi-color cards featuring black as one of their colors: cards like Abrupt Decay, Vindicate, and Pernicious Deed.

+1 for colorless options. (Not mentioned: Karn Liberated) They're an excellent choice for mono-B EDH decks, which don't have the option of splashing a color. For a casual deck, Priest of Yawgmoth could be a fun sac outlet for Spine of Ish Sah, too.
– Brian SApr 21 '14 at 13:53

This is a very comprehensive list. I agree that multicolor options are the best bet, green and white tend to have the most enchantment destruction, and would be the probably best colors to pair with to combat enchantment strategies. Merciless Eviction and Pernicious Deed can both deal with all enchantments without collateral damage.
– TryingApr 21 '14 at 17:32

Colorless is the best option unless you want to get pretty heavy into discard. My personal solution in my mono black commander is Argentum Armor, but it's in commander where time and mana are not issues.